DE102011012915A1 - A system for counting a distribution of a measurable quantity between a terminal and a vehicle - Google Patents

Abstract

The invention relates to a system for counting a distribution of a measurable size, which comprises a set of distribution connections (bj) for distributing a measurable size and a set of vehicles (Vi), in which a data center (C) comprises: means for the same Measurable Size Distribution Process to determine data of a counting error between the quantity of the measurable size counted by a terminal and the quantity of the measurable size counted by a vehicle, and calculating means for determining an average counting error of the terminal relative to a total of counting data for each terminal that come from all or part of the totality of vehicles.

Description

Technical field and state of the art

The invention relates to a system for counting a distribution of a measurable quantity between a distribution port of the measurable variable and a vehicle.

In the preferred embodiment of the invention described below, the measurable quantity is the electric power and the vehicles are electric vehicles operated by the electricity supplied from electricity distribution terminals. However, generally, the invention relates to any type of measurable size that can be distributed from a distribution port. The measurable quantity may thus be, for example, a set of digital data constituting music, video, information regarding a parking period of the vehicle, and so on.

The problem of measuring the consumption of electrical energy is a problem whose severity will continue to grow in the coming years. At present, the European legislation requires that the counting of active electrical energy intended for domestic, commercial or "light" industrial use must be carried out by means of an officially approved meter meeting the requirements of the Annex MI-003 of European Directive 2004/22 / CE of 31 March 2004 on measuring instruments published in the Official Journal of the European Union dated 30 April 2004 , must meet.

As far as electric vehicles are concerned, they are currently very few. Studies on the development of these vehicles are currently underway. The stock of electric vehicles, and in particular electric cars, is expected to increase strongly in the coming years.

The problem of measuring the electrical energy consumed by these electric vehicles will inevitably arise.

The inventive system for counting a distribution of electrical energy allows to respond to this measurement problem in an accurate and less costly way.

Presentation of the invention

• – jeder Anschluss aufweist: Anschlusszähleinrichtungen, die eine von dem Anschluss zu einem Fahrzeug zugeführte Menge einer messbaren Größe zählen und Anschlusszähldaten bereitstellen können, die die zugeführte Menge der messbaren Größe repräsentieren, Anschlussidentifikationseinrichtungen, die Daten bereitstellen, die den Anschluss identifizieren, Anschlussuhreinrichtungen, die Anschlussdatumsdaten bereitstellen können, die ein Datum repräsentieren, an welchem eine Verteilung einer Menge einer messbaren Größe zwischen dem Anschluss und einem Fahrzeug stattgefunden hat, Erzeugungseinrichtungen zum Erzeugen eines Anschlusssignals, das für jede zugeführte Menge einer messbaren Größe die Anschlusszähldaten, die Anschlussidentifikationsdaten und die Anschlussdatumsdaten aufweist,
• – jedes Fahrzeug aufweist: Fahrzeugzähleinrichtungen, die eine von einem Anschluss zu dem Fahrzeug zugeführte Menge einer messbaren Größe zählen und Fahrzeugzähldaten bereitstellen können, die die zugeführte Menge der messbaren Größe repräsentieren, Fahrzeugidentifikationseinrichtungen, die Daten bereitstellen, die das Fahrzeug identifizieren, Fahrzeuguhreinrichtungen, die Fahrzeugdatumsdaten bereitstellen, die ein Datum repräsentieren, an welchem eine Verteilung einer Menge einer messbaren Größe zwischen einem Anschluss und dem Fahrzeug stattgefunden hat, Erzeugungseinrichtungen zum Erzeugen eines Fahrzeugsignals, das für jede zugeführte Menge einer messbaren Größe die Fahrzeugzähldaten, die Fahrzeugidentifikationsdaten und die Fahrzeugdatumsdaten aufweist,
• – Übertragungseinrichtungen, die jedes Anschlusssignal und jedes Fahrzeugsignal zu einem Rechenzentrum übertragen, das die Anschlusssignale und die Fahrzeugsignale empfängt und verarbeitet, wobei das Rechenzentrum aufweist:
• – Empfangseinrichtungen, die durch Vergleichen von empfangenen Anschlusssignalen und Fahrzeugsignalen ein Steuersignal bereitstellen können, das für dieselbe Verteilung einer Menge einer messbaren Größe jedes Anschlusssignal mit dem entsprechenden Fahrzeugsignal paart,
• – Berechnungseinrichtungen, die für jedes zusammengestellte Paar aus Anschlusssignal und Fahrzeugsignal Zählabweichungsdaten einer Zählabweichung zwischen den Anschlusszähldaten und den Fahrzeugzähldaten bestimmen können,
• – Berechnungseinrichtungen, die für jeden Anschluss, ausgehend von einer Gesamtheit von Zählabweichungsdaten, einen mittleren Zählfehler der Anschlusszähleinrichtungen bezogen auf eine Gesamtheit von Zähldaten bestimmen können, die von Fahrzeugzähleinrichtungen der ganzen oder eines Teils der Gesamtheit von Fahrzeugen bereitgestellt werden.

In fact, the invention relates to a system for counting a distribution of an amount of a measurable quantity between a distribution terminal of the measurable quantity belonging to an aggregate of terminals and a vehicle belonging to an entirety of vehicles, wherein:

• Each port comprises: port counters that count an amount of measurable size supplied from the port to a vehicle and that can provide port count data representing the amount of measurable size supplied, port identification devices that provide data identifying the port, port devices, port date data providing a date on which a distribution of a quantity of a measurable quantity has taken place between the terminal and a vehicle, generating means for generating a terminal signal having the terminal count data, the terminal identification data and the terminal date data for each supplied amount of a measurable quantity;
• Each vehicle comprises: vehicle counters that count an amount of measurable quantity supplied from a port to the vehicle and can provide vehicle count data representing the amount of measurable quantity supplied, vehicle identification devices that provide data identifying the vehicle, vehicle control devices, vehicle date data providing a date on which there has been a distribution of a measurable quantity between a terminal and the vehicle, generating means for generating a vehicle signal having the vehicle count data, the vehicle identification data, and the vehicle date data for each quantity of measurable quantity supplied;
• Transmission means transmitting each terminal signal and each vehicle signal to a data center receiving and processing the terminal signals and the vehicle signals, the data center comprising:
• Receiver means adapted to provide, by comparing received port signals and vehicle signals, a control signal which pairs for the same distribution of an amount of measurable magnitude of each port signal with the corresponding vehicle signal,
• Calculation means for determining, for each pair of terminal signal and vehicle signal pair, count deviation data of a count deviation between the terminal count data and the vehicle count data,
• - calculating means capable of determining, for each terminal, based on a set of counting error data, a mean counting error of the terminal counters relative to a set of counting data provided by vehicle counting means of all or part of the whole of vehicles.

The various calculating means of the data center are realized, for example, by a microprocessor, a computer or specific electronic circuits.

According to another feature of the invention, at least one terminal of the entirety of terminals is a calibrated terminal in which the terminal counters are calibrated counters capable of providing reference count data.

Brief description of the drawings

Other features and advantages will become apparent upon reading of a preferred embodiment made with reference to the accompanying drawings.

1 shows an example of a system according to the invention for counting a distribution of electrical energy;

2 shows an electric vehicle connected to a terminal of a distribution of electric power in a process of distributing electric power from the terminal to the vehicle;

3 shows a particular element of the inventive system for counting a distribution of electrical energy;

4 shows a first development of the in 3 shown special item;

5 shows a second evolution of the in 3 shown special item; and

6 shows a third evolution of the in 3 shown special item.

In all figures, the same reference numerals denote the same elements.

Detailed illustration of preferred embodiments of the invention

An electric vehicle has a range problem that forces it to recharge its batteries frequently. The recharging is done by a recharging terminal arranged in the public or private room. For example, simulations have shown that it needs at least 1.4 recharging connections per electric vehicle to ensure good management of the supply of an EV fleet with energy. For a large stock of electric vehicles, it is therefore necessary to have an equally large stock of recharge connections. The system of the invention is particularly well adapted to such a situation.

1 shows an example of a system according to the invention for counting a distribution of electrical energy.

The counting system of the invention comprises a total of N terminals of distribution of electric energy ("electric power distribution terminals") b ₁ , b ₂ , ..., b _j , ..., b _N , a set of M electric vehicles V ₁ , V ₂ , ..., V _i , ..., V _M and a data center C on. For example, the number N of terminals is equal to 1.4 times the number M as mentioned above. The entirety of the terminals b _j is connected to the data center C via a transmission network RT.

2 shows an electric vehicle V _i connected via a connecting cable K with an electrical power distribution terminal b _j when distributing electrical energy ("electrical energy distribution").

The electrical power distribution terminal b _j includes: distributing means MD _j V _i out of the vehicle, an electric power amount Anschlusszähleinrichtungen MCb _j, the count supplied from the distribution devices MD _j electric power amount, connection identification means, the data Rb _j provide identifying the terminal and terminal units Hb _j which can provide connection data DHb _j representing a date on which electric power distribution has occurred, generation means MFb _j for generating a terminal signal Sb _{j characterizing} a power distribution operation between the terminal and the vehicle, and terminal output means MFb _j , which transmit this signal over the transmission network RT to the data center.

The terminal signal Sb _j is, for example, an Internet-type electric signal and the transmission network RT is the Internet network.

• – die Anschlussreferenzdaten Rb_j, die den Anschluss identifizieren,
• – Fahrzeugreferenzdaten Rv_i, die das Fahrzeug identifizieren,
• – die Datumsdaten DHb_j, und
• – Daten E_bj,vi der elektrischen Energiemenge, die die elektrische Energiemenge repräsentieren, die von dem Anschlusszähler b_j als diejenige, die dem Fahrzeug V_i zugeführt worden ist, gezählt worden ist.

The connection signal Sb _j has:

• The port reference data Rb _j identifying the port
• Vehicle reference data Rv _i identifying the vehicle
• - the date data DHb _j , and
• Electric energy amount data E _{bj, vi representing} the amount of electric power counted by the terminal counter b _j as that supplied to the vehicle V _i .

Similarly, the electric vehicle V _i comprises: means MA _i for storing the electric power supplied from the distributing means MDb _j , vehicle counting means MCv _i for counting the amount of electric power supplied to the vehicle, vehicle identification means providing the data Rv _i identifying the vehicle, Vehicle control devices HV _i for providing vehicle data DHV _i , which represent a date on which an electric power distribution has taken place, generating means MFV _i for generating a vehicle signal Sv _i , which characterizes an electric power distribution between the terminal and the vehicle, a memory MS _i for storing the signals generated by the signal generating means MFv _i Sv _i, an output circuit MeV _i for transmitting the data stored in the memory MS _i vehicle signals over the network RT to the data center C, and / or a GSM station mod _i to the OB transmit the vehicle signals provided by the generating means MFV _i directly to the data center via the GSM network.

The vehicle signal Sv _i is, for example, an Internet-type-transmitted electric signal transmitted through the Internet network.

• – die Anschlussreferenzdaten Rbj,
• – die Fahrzeugreferenzdaten Rv_i,
• – die Datumsdaten DHv_i, und
• – Daten E_vi,bj der elektrischen Energiemenge, die die elektrische Energiemenge repräsentieren, die von dem Zähler des Fahrzeugs V_i, als diejenige, die von dem Anschluss b_j herkommend zugeführt worden ist, gezählt worden ist.

The vehicle signal Sv _i has:

• The connection reference data Rbj,
• The vehicle reference data Rv _i ,
• - the date data DHv _i , and
• Electric energy amount data E _{vi, bj representing} the amount of electric energy counted by the counter of the vehicle V _i , as that supplied from the port b _j .

In a first embodiment of the invention, the vehicle signal Sv _i is stored in the memory MS _i. In a later electric power distribution process, the vehicle signal is then transmitted to the data center C. The vehicle signal (in 2 with Sv _{i / k} ), the data center C thus reaches the vehicle output circuit MEv _i , a wire connection of the cable K, the output circuit of the terminal connected to the vehicle, and the network RT.

In a second embodiment of the invention provided by the signal generating means DTMF _i Sv _i signal directly to the GSM-station mod _i is transmitted, which is connected via the GSM network to the data center C. The signal Sv _i thus reaches the data center C directly via the GSM network.

The data center C has processing means for processing electrical or electromagnetic signals received from terminals or electric vehicles (cf. 3 ). The processing devices have receiving devices 1 and calculating means 2 and 3 on.

The reception facilities 1 compare the reference data and the date data included in the signals Sb _j and Sv _i to pair each terminal signal with the corresponding vehicle signal for the same power distribution process.

For the same power distribution process, the reference data Rb _j and Rv _{i are} strictly identical and the data DHv _i and DHb _j are substantially identical. The date data generally corresponds to measurements taken almost to the second. The date data is therefore generally not strictly identical because the counters can not perform timekeeping with such precise synchronization. Nevertheless, in the context of the invention, the date data DHv _i and DHb _{j are} considered identical, provided they are linked to identical reference data in a time interval of limited duration, for example, equal to 5 mn.

The receiving circuit 1 provides a control signal k capable of identifying whether a terminal signal and a vehicle signal correspond to the same electric power distribution process. Under the influence of the control signal k, the calculation means calculate 2 for each power distribution operation, count deviation data ΔE _ji representing the deviation between the electric power amount E _{bj, vi} counted by the terminal counters and the electric power amount E _{vi, bj} counted by the vehicle counter. Starting from a set of counting deviation data ΔE _{j, i} calculated over a duration Δt, the calculating devices then calculate 3 the mean count error EM _j of terminal j with respect to the totality of count data coming from all or part of the vehicles of the totality of electric vehicles.

The electric energy counting system according to the invention thus allows to characterize the mean count deviation EM _j that exists between each port b _{j of} the entirety of ports and all or part of the electric vehicle fleet.

• – Vergleichseinrichtungen 4 zum Vergleichen des mittleren Fehlers EM_j mit einem Schwellenwert S, und
• – Alarmeinrichtungen 5, die ein Alarmsignal Saj bereitstellen, sobald der mittlere Fehler EM_j den Schwellenwert S erreicht.

According to a first development of the invention, the data center 1 also (cf. 4 ):

• - Comparative devices 4 for comparing the mean error EM _j with a threshold S, and
• - Alarms 5 which provide an alarm signal Saj as soon as the mean error EM _{j reaches} the threshold value S.

A crossing of the threshold value detected for the same vehicle and at least two different ports indicates that it is the vehicle that is faulty, whereas exceeding the threshold for the same port and at least two different vehicles indicates that it is the count of the port that is faulty.

It is then possible to detect the connections or vehicles considered to be faulty. The faulty connections or vehicles are then taken out of the counting system.

5 shows a data center, which corresponds to a second development of the counting system according to the invention.

According to the second aspect of the invention, among the N power distribution terminals, there are calibrated terminals in which the terminal counters are calibrated counters that can provide reference count data, that is, accurate count data considered as accurate data of the electric power supplied to the electric vehicles. A port b _j is thus either a non-calibrated port bin or a calibrated port b _each .

The reception facilities 1 therefore have additional facilities that can identify whether a connection b _j an uncertified port bin or a calibrated port b _ever. If it is identified that the count data of a calibrated port b _each come from is by the calculating means 2 calculated deviation ΔE _{je, i} used to using computational means 6 calculate a counting error ΔV _{i of} a vehicle V _i . The counting error ΔV _i represents the systematic counting error of the counting devices of the vehicle V _i . Once a counting error .DELTA.V _i is a vehicle V _i is calculated, the latter is then by the calculating means 3 used to correct all new count data coming from the vehicle V _i .

Therefore, due to the presence of calibrated power distribution terminals, it is advantageously possible to center back, for a given duration, all or part of the total count data originating from vehicle electric vehicles to the count data which are close to the reference data.

Thus, according to the second further development of the invention, the counting devices of the electric vehicles as well as the counting devices of the non-calibrated connections can be simple and low-cost counters that provide less accurate information that is substantially removed from accurate information. Such a counting system is generally less expensive because it uses only a very small proportion of costly elements, namely the calibrated connections.

In the above-described embodiments of the invention, the data center determines the average count error EM _{j of} the counters of each terminal b _j with respect to counters of all or part of the electric vehicle inventory. The information underlying the processing performed by the data center C, for each electrical power distribution process, consists of the count made by the terminal providing the electrical energy and the count received from the electric vehicle receiving the power , will be charged. Thus, mutatis mutandis, the invention also relates to embodiments in which the data center C determines the mean count error EM _{j of} the counters of each vehicle V _i with respect to the counters of all or part of the total of the electrical power distribution terminals, as well as embodiments in which the data center C simultaneously detects the mean error EM _j and the mean error EM _i .

6 Thus, Fig. 1 shows the case where the data center C obtains the average count error EM _{i of} the counters of each vehicle V _i with respect to the counters of all or part of the entirety of the electrical power distribution terminals. In this embodiment of the invention the counting error .DELTA.V _i is a vehicle V _i used to calculate the counting error of a whole or part of the whole of the counting means is not calibrated ports that have been associated with the vehicle V _i for an electrical energy distribution in relationship. For this purpose, calculation facilities 3 ' used.

In all cases in which the invention utilizes calibrated distribution terminals, the presence of these distribution terminals permits recentration - over a given period of time - of the totality of metering data originating from all or part of the fleet of electric vehicles and / or the totality of metering data, that of all or part of the non-calibrated electrical Power distribution connections resulting in count data that are close to the reference data.

In a particularly advantageous manner, it is therefore not necessary that the accuracy of the vehicle counter and / or the non-calibrated connection counter is large. Over a given period of time, for example, a monthly duration, then accumulation of terminal and vehicle metering data, corresponding to vehicle travel, will result in providing sufficiently accurate metering information for that vehicle which can be used to estimate the electrical power consumption of the vehicle to calculate over the considered period.

In the preferred embodiment of the invention described above, the measurable quantity is electricity. As already mentioned above, the invention relates to any type of measurable size. Consequently, the invention also relates to the case in which simultaneously or not simultaneously several measurable quantities are distributed from the same distribution connection to the same vehicle. Every measurable quantity must then be identified for what it is. When a vehicle loads a quantity of measurable magnitude, then a code characterizing the selected measurable quantity is exchanged between the vehicle and the terminal. The terminal signal and the vehicle signal thus each contain this code.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• Annex MI-003 of European Directive 2004/22 / CE of 31 March 2004 on measuring instruments published in the Official Journal of the European Union dated 30 April 2004 [0003]

Claims (10)

A system for counting a distribution of an amount of a measurable quantity between a distribution terminal (b _j ) of the measurable quantity belonging to a set of terminals and a vehicle (V _i ) belonging to a set of vehicles, wherein: - each terminal (b _j ) comprises: terminal counters (MCb _j ) for counting an amount of measurable quantity supplied from the terminal to a vehicle, and for providing terminal count data representing the quantity of measurable quantity supplied, terminal identification means providing data (Rb _j ) identify the terminal, terminal facilities (Hb _j ) for providing terminal data (DHb _j ) representing a datum on which a distribution of a measurable quantity has been distributed between the terminal and a vehicle, generating means (MFb _j ) for generating a terminal signal (Sb _j ) added for each Each vehicle (V _i ) comprises: vehicle counter means (MCv _i ) for counting an amount of measurable quantity supplied from a port to the vehicle and providing vehicle count data (E _{vi, bj} ) representing the amount of measurable quantity supplied, vehicle identification means for identifying data (RV _i ) identifying the vehicle, vehicle timer means (HV _i ) for providing vehicle date data (DHV _i ) representing a date at which a distribution of a quantity of a measurable variable has taken place between a terminal and the vehicle, generating means (MFv _i ) for generating a vehicle signal (Sv _i ) which, for each quantity of measurable quantity supplied, the vehicle counting data (DHv _i ), the vehicle identification data (RV _i ) and the vehicle date data (DHv _i ), transmission means (MEV _i , MEb _j , RT) transmitting each terminal signal and each vehicle signal to a data center (C) capable of receiving and processing the terminal signals and the vehicle signals, the data center comprising: Reception facilities ( 1 ) for providing a control signal (k) by comparing received terminal signals and vehicle signals, the control signal for the same distribution mating a quantity of a measurable quantity of each terminal signal with the corresponding vehicle signal, 2 ) for determining, for each pair of terminal signal and vehicle signal pair, count deviation data (ΔE _{j / i} ) of a count error between the port count data and the vehicle count data; 3 ) for determining, for each port, based on a set of count deviation data, a mean count error (EM _j ) of the port counters relative to a set of count data provided by all or part of the vehicle counter of the entirety of vehicles. System according to claim 1, in which the transmission means (MEV _i , MEb _j , RT) consist of: - connection signal transmission means comprising a connection output circuit (MEb _j ) and a transmission network (RT) to which the connection output circuit is connected, and Vehicle signal transmission equipment comprising in series: a vehicle memory (MS _i ), a vehicle output circuit (MEV _i ), a wire connection (K) between the vehicle output circuit and a terminal output circuit (MEb _j ) and the transmission network (RT) connected to the terminal output circuit is. A system according to claim 1, wherein the transmission means are: terminal signal transmission means comprising a port output circuit (MEb _j ) and a transmission network (RT) connecting the port output circuit to the data center (C), and vehicle signal transmission means a GSM station connected to the data center via the GSM network. System according to one of the preceding claims, in which the data center (C) comprises comparators ( 4 ), which compares the mean count error of the counters of each terminal with a threshold (S), and alarms ( 5 ) which provide an alarm signal as soon as the average error reaches the threshold. A system according to any one of the preceding claims, wherein at least one terminal of the set of terminals is a calibrated terminal (b _je ) in which the terminal counters are calibrated counters to provide reference count data. A system according to claim 5, wherein the receiving means ( 1 ): - additional means for identifying whether a terminal having supplied a quantity of a measurable quantity to a vehicle is a calibrated or non-calibrated terminal, - means, if it is identified, that a calibrated terminal provides a vehicle with an amount of measurable Size has fed, one Calculate vehicle count error (ΔV _i ) expressing the count error of the vehicle counting devices with respect to the calibrated port counters; and means for correcting, based on the vehicle count error, all later count data of the vehicle whose counting error has been calculated. System according to claim 5, in which the receiving devices ( 1 ): - additional means for identifying whether a terminal having supplied a quantity of a measurable quantity to a vehicle is a calibrated or non-calibrated terminal, - means, if it is identified, that a calibrated terminal provides a vehicle with an amount of measurable has supplied to size, to calculate a Fahrzeugzählfehler (.DELTA.V _i), which expresses the relative the counting error of the counting devices of the vehicle on the counting means of the calibrated port, and - means for starting from the Fahrzeugzählfehler all or part of the counting of non-verified terminals have been related to the vehicle for a process of distributing a measurable quantity. A system according to any one of the preceding claims, in which the communications network is the Internet network. A system according to any one of the preceding claims, in which the measurable quantity is electricity and the vehicles are electric vehicles. A system for counting a distribution of an amount of a measurable quantity between a distribution terminal (b _j ) of the measurable quantity belonging to a set of terminals and a vehicle (V _i ) belonging to a set of vehicles, wherein: - each terminal (b _j ) comprises: terminal counters (MCb _j ) for counting an amount of measurable quantity supplied from the terminal to a vehicle and for providing terminal count data (E _{bj, vi} ) representing the supplied amount of the measurable quantity, terminal identification means, the data provide (Rb _j) identifying the terminal, _(j Hb) (Anschlussuhreinrichtungen to (DHB _j) provide connection date data representing a date, has taken place at which a distribution of an amount of a measurable size between the terminal and a vehicle generating means MFb _j ) for generating a terminal signal (Sb _j ) for each the amount of measurable quantity supplied includes the terminal count data, the terminal identification data and the terminal date data, each vehicle (V _i ) comprises: vehicle counter means (MCv _i ) for counting an amount of measurable quantity supplied from a terminal to the vehicle and for generating vehicle count data (E _{vi, bj} ) representing the amount of measurable quantity supplied, vehicle identification means for providing data (RV _i ) identifying the vehicle, vehicle timers (HV _i ) for providing vehicle date data (DHV _i ) representing a date, on which a distribution of a quantity of a measurable variable between a terminal and the vehicle has taken place, generating means (MFv _i ) for generating a vehicle signal (Sv _i ) which, for each quantity of measurable quantity supplied, the vehicle counting data (DHV _i ), the vehicle identification data ( RV _i ) and the vehicle date data (DHV _i ), transmitting means (MEV _i , MEb _j , RT) for transmitting each terminal signal and each vehicle signal to a data center (C) for receiving and processing the terminal signals and the vehicle signals it receives, wherein the data center comprises: - receiving devices ( 1 ) to provide, by comparing received port signals and vehicle signals, a control signal (k) which, for the same distribution of an amount of measurable magnitude, pairs each port signal with the corresponding vehicle signal, 2 ) for determining, for each pair of terminal signal and vehicle signal pair, count deviation data (ΔE _{j / i} ) of a count error between the port count data and the vehicle count data; 3 ) to determine, for each vehicle, based on a set of count deviation data, an average count error (EM _i ) of the vehicle counters relative to a collection of count data provided by all or part of the port counters of the set of ports.

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